Apparatus for determining fluid density



March 24, 1936. o. P. ADAMS ET Al.

APPARATUS FOR DETERMINING FLUID DENSITY Filed Feb. 19, 1935 2 Sheets-Sheet l [weidos: @QA/voo P40p/ws, CL r0.5 D.

MarCh 24, 1936. Q p. ADAMS Er AL 2,035,039

APPARATUS FOR ADETFIHMINING FLUID DENSITY Filed Feb. 19, 1955 2 Sheets-Sheet 2 [wey/dar.' @Bbq/voo P 40g/W5, CL V05 D. PH/L/P ma JOHN l/OECE,

Patented Mar. 24, 1936 UNITED STABS APPARATUS FOR DETERG FLUID DENSITY i ration of New Jersey Application February 19, l1935, serial No. 7,288

1 Claim.

This invention relates to apparatus-for determining iiuid density, one of the objects being to continuously analyze a gas or a. mixture of gases for changes in density. Other objects may be inferred.

An example of this apparatus is illustrated by the accompanying drawings, in which:

Figure 1 is a longitudinal section.

Figure 2 is a cross-section taken from the line II-II in Figure 1.

These drawings show a chamber I having an outlet 2, a pressure regulator 3 for providing a flow at a constant pressure of the fluid Whose density is to be determined, a hollow shaft 4 extending into the chamber I and receiving the flow from the pressure regulator 3, tubular inlets 5 for the chamber I which are transversely fixed to the shaft E and communicate with the same, a synchronous electric motor 6 coupled to the shaft 4, a. cap I which closes the outlet 2 s o as to limit the flow of uid through the same to a determinable rate and a differential pressure gage 8 which is connected with both the fluid flow from the pressure regulator 3 and the chamber I, the dial of this pressure regulator being preferably calibrated in termsr of density rather than pressure.

In operation, the pressure regulator 3 provides a cw of the gas or mixture of gases whose density is to be determined. This flow is introduced to the chamber I by way of the inlets 5 which are rotated at a constant speed by the motor 6 and which, therefore, introduce these gases to this chamber under the impelling influence of a constant rotative speed. It should be noted that both the pressure of iiow and the rotative speed are of constant value. It follows that the only thing which will cause a pressure variation in the chamber I will be a. variation in the weight of gas, or mixture of gases proceeding through the `tubes 5. Such a variation is indicated by the pressure gage 8. As previously explained, this pressure gage may read directly in terms of density. Although shown as an indicator, it should be understood that the apparatus is applicable in any instance Where it is desired to control any operation or effect upon a variation of a fluid density. Thus, in many cases it may be desirable to substitute controlling apparatus of various types for the pressure gage 8. n

The mechanical detailsV of the apparatus will now be described more specically.' I

The shaft 4 extends completely through the chamber I and projects beyond both sides ofthe latter. This shaft is only hollow from one of its ends to a point within the chamber, and the tubular inlets 5 are straight sections of pipe which are right angularly fixed to the shaft 4 by screw-connections, as at 9. The arrangement is such that the tubular inlets open into the hollow portion of the shaft d.

Stuffing boxes I0 seal the shaft d where it passes through the ends of the chamber I. these being of thel adjustable character provided with packing nuts A chamber I2 having an open side provided with a removable closure I3 encloses the hollow projecting portion of the shaft 4 and the end'of this portion, a conduit III which opens into the end of this chamber I 2 providing means for introducing the ow of fluid from the pressure regulator 3 to this chamber. An anti-friction bearing I5 supports the end portion of the shaft 4 in this chamber I 2, and an oil seal I6 is provided between the open end of this portion of the shaft and this anti-friction bearing.

A somewhat similar chamber I'I encloses a part of the solid projecting portion of the shaft 4 and mounts the latter through an anti-friction bearing I8 arranged in its end away from the chamber I, an oil seal I9 also being provided for this latter bearing. This chamber I'I also has an open side provided with a closure 20.

The differential pressure gage 8 is connected by a conduit 2I to the outlet 2 and by a conduit 22 to the conduit I4. Also, it shouldbeunderstood that the cap 1 is provided with an orifice Ia of a size suitable to the probable density range of the particular fluid with which the apparatus is to be used, and that other caps may be provided with differently sized orices for use with uids having different density ranges.

The chambers I2 and I l function to prevent the escape of uid which might leak through the stuffing boxes III, and their construction is such that the removal of their respective closures I3 and 20 permit ready access to the stufng boxes to permit their adjustment. 'Ihe bearings I5 and I8 function to relieve these stufng boxes from the strain of supporting the shaft 4.

We claim:

Apparatus for determining fluid density, including the combination of a chamber having an outlet, means for providing a ow at a con- I being hollow from one of its ends to a point within said chamber, at least one tubular inlet for said chamber which is right angularly fixed to said 55 2 aosaoae shaft in communication with its hollow portion, adjustable means for sealing said shaft where it passes through said chamber, a. chamber having an open side provided with a removable closure for enclosing the hollow projecting portion of said shaft and the end of this portion, means for introducing said flow to the second named chamber. a bearing in said second named chamber for said hollow projecting portion of said shaft, a

bearing for the other projecting portion of said shaft, a synchronous electric motor coupled to said other projecting portion of said shaft and means operable by the pressure in said chamber for determining the density of said fluid.

ORLANDO P. ADAMS. CLYDE D. PHILLIPS. JOHN E. VORCE. 

